Aserter or Asserter: How To spell?
The word Aserter is misspelled against Asserter, a noun meaning "One who asserts; one who avers pr maintains; an assertor."
Asserter has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & erter which should not be misspelled with single 'S'
Wrong Spelling:  a-s-erter  Correct Spelling:  a-ss-erter 
Explore spell check of Asserter to spell without errors.